I have used the same method for painting door and body jambs for decades. When painting the inside body jambs, trunk drip rails, engine compartment etc. I use the old tried and true method of folding over the tape to create a small lip that blows the paint just over the jamb roll onto the body. Using this old method allows me to do a final body sand after attaching doors, trunk lid, etc. and level the lightly blown over paint down to an even surface. Two or three years ago Len put me onto 3M's "smooth Transition Tape" 06800 for taping off inside finished body jambs. I run 2 rows of the 3M 06800 tape right up to the lid of body jamb (maybe set back 1/64") followed by a second row of this tape just behind it. This allows me to shoot base coat on body, pull first row of tape and finish with clear coat that allows the product to push up to and just under the second row of transition tape. After cut and buff this method allows for no lines to be seen after pulling final row of tape.
My question is has anybody used this 3M transition tape on the exterior of the body for painting inside body jambs and trunk rails in place of using our old tried and true method of folded tape (see pics). While the folded tape method works great it can get very time consuming on some of these projects when taping off for inside BODY jambs, trunk, etc.. I have a new project coming up in the next few weeks I am considering trying the 3M transition tape on the outside of the body for the inside body jambs, unless someone can tell me it doesn't work well.